React: Managing Complex Form State with Nested Objects and Custom Hooks
I need help solving I'm reviewing some code and I'm building a complex form in React (version 17.0.2) that handles nested objects, and I'm running into issues with managing state effectively... My form has multiple sections, each with its own set of inputs that correspond to a nested object in my state. I've created a custom hook for managing the form state, but I'm experiencing unexpected behaviors during updates, especially when trying to update deeply nested properties. Here’s a simplified version of my code: ```javascript import React, { useState } from 'react'; const useForm = (initialValues) => { const [values, setValues] = useState(initialValues); const handleChange = (event) => { const { name, value } = event.target; setValues((prevValues) => ({ ...prevValues, [name]: value, })); }; return [values, handleChange]; }; const MyForm = () => { const initialValues = { user: { name: '', address: { city: '', zip: '' } } }; const [formValues, handleChange] = useForm(initialValues); return ( <form> <input type="text" name="user.name" value={formValues.user.name} onChange={handleChange} /> <input type="text" name="user.address.city" value={formValues.user.address.city} onChange={handleChange} /> <input type="text" name="user.address.zip" value={formValues.user.address.zip} onChange={handleChange} /> <button type="submit">Submit</button> </form> ); }; ``` The issue arises when I try to update the nested properties like `user.address.city` or `user.address.zip`. Instead of just updating the specific field, it seems to overwrite other properties or even reset them to their initial values. I'm seeing the warning: "Warning: Failed prop type: Invalid prop `name` supplied to `input`." which I suspect is related to how I'm trying to access state updates for nested properties. I've tried various ways to handle the nested object update, including using libraries like `lodash` for deep merging, but those approaches seem to complicate things even further. I also looked into using `useReducer`, but I’m not sure it’s necessary for this complexity. Can someone suggest a reliable method for managing nested state updates in React forms without running into these issues? Any advice on best practices or patterns would also be appreciated! Any advice would be much appreciated. I've been using Javascript for about a year now. Any help would be greatly appreciated!